The Chinese word 太阳镜 (tàiyángjìng) for "sunglasses" is a straightforward compound noun formed through semantic combination: 太阳 (tàiyáng) means "sun," and 镜 (jìng) means "glasses" or "lens." Therefore, the term literally and logically translates to "sun-glasses," directly describing the object's primary function of protecting the eyes from the sun, which is a common and transparent method of word formation in Chinese where two meaningful characters are combined to create a new, specific meaning.